Richard pattison



` (No Model.) Y R. PAIIIII'IISOL4 PNBBMATIG TIRE.

No. 573,991. Patented' Dee. 29;1896.

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UNITED ,STATES PATENT OFFICE."

RICHARD PAT'SON, OF NEW' YORK, N. Y., ASSIGNOR V'TO I-IIMSELF, PATRICK BROVMLEY, AND CHARLES DRUOKLIEB, OF `SAMEPLAOE.

ISN E U MATIC T l RE.

SPECIFICATION forming' part of Letters Patent No. 573,997, dated December 29, 1896.

` Applicationtiedttmry17,1896. seritlNo. 575,887. cromati.)

To all whom it may concern; lar grooves lare formed,wherebya substan- Beit known that I, RICHARD PATTISON, a tially T-shaped groove is provided, which is citizen of the United States, and a resident adapted to receive and retain a metal ringB of New York city, county oftNew York,`and and a detachable tread O. Said tread C is 55 5 State of New York, have invented certain new composed of rubber or other flexible mateand usefullmprovements in Pneumatic Tires, rial, and it is dovetailed in cross-section., its of which thefollowing is a sp'cii'cation, refsidewalls exactly registering with the inerence being had to the accompanying drawwardly-inclined side Walls of the groove 2 of ings, forming a part thereof, in which similar the tire A and its inner sur ce bearing upon 6o 1o letters andnumenals of reference indicatecorthe periphery of the metal ring B.

responding parts. The ringB is preferably composed of spring- This invention relates to improvementsin steel, but other material of sufficient resilipneumatic tires for bicycle or other vehicle ency and strength may be used. This said wheels, the object of the invention being to ring is incased ina covering b, of fabric, pref- 65 f5 provide an article of this character which will erably cotton, in order to supply a surface be so constructed as to be practically nonadapted to take a coating of cement, which puncturable through the tread thereof to the will be used to hold the parts together. pneumatic portion. The tire will be light in In order to lighten the tread O and also to weight, inexpensive, and durable, and it will increase its resiliency, it is provided with a 7o zo be susceptible of quick attachment to the rim series of annular grooves c, which form anof a bicycle or other wheel, and its tread can nular chambers and act as cushions when the be repaired or renewed Without in any way parts are assembled and admit of very easy injuring or disturbing its pneumatic portion. riding, but the walls c have sufficient strength The invention will be hereinafter fully deto prevent the tread O from becoming useless 7 5 2 5 scribed, and specifically set forth in the anshouldpone of the grooves c be punctured. neXed claim. To further lighten and increase the resiliency In the accompanying drawings, forming of said tread, one or more of the annular walls part of this specication, Figure lis a side elec may have formed therethrough notches or vation of my improved tire. Fig. 2 is a side openings c2. The tread may also be supplied 8o 3o elevation, partly broken away, of a portion upon its outer surface with cross grooves or of thetire, illustrated in full size and attached corrugations c8 to facilitate traction upon to the rim of a wheel. Fig. 3 is a cross-secsmooth or wet surfaces. tional elevation taken on a line oc of Fig. 2. In assembling the parts the covered ring B Fig. 4t is a perspective View of a portion of and the grooved tread C are tightly cemented S5 3 5 the tread of the tire; and Fig. v5 is a cross` within the groove 2 and to each other, wheresectional elevation of the pneumatic portion by a durable tire is produced having its of the tire, having'its tread removed. pneumatic portion thoroughly protected from In the practice of myinvention I construct the danger of puncture directly through the a pneumatic tube A, of rubberor other flexitread thereof. After assembling the said 9o 4o ble material, and form integrally therewith parts the tire is attached to the rimD of any the ordinary tubular projection a, to which suitable wheel and inflated in a manner comis secured any suitable feed-valve ct', through mon to all pneumatic tires. which air is adapted to be pumped into the I do not confine myself to the specic de-V annular chamber a2 by a hand or other airtails of construction as herein described and 9 5 45` pump in the customary manner. The outer shown, as I believe that under the scope of or4 tread portion l of the tube Ais thickened my invention I am entitled to make slight and attened upon its inner surface, but its modifications. outer surface is convex in cross-section. Into Having thus described my invention, what and around this said outer or tread portion I claim as new, and desire to secure by Letters ice 5o is formed an annular dovetailed groove 2, Patent, ismand into the side walls of this groove annu- The combination of a pneumatic tube hav ing,` e thickened outer surface with an annu- In testimony that I claim the foregoing as 1o lar groove therein; with a fabric covered my invention I have signed my name, in presspring-lnetal ring and a, flexible tread have ence of tWo witnesses, this 15th dayof J anning annular grooves therein and notches or ary, 1896. openings through the Walls separating said grooves, lnd cross-corrugetions upon its outer surface, the said parts being,` cemented to each VitneSSes: other Within the `groove of the pneumatic tube, M. MAOLEAN,

RICHARD PATTISON.

substantially as shown and described. i B. MCCOMB. 

